Heat oil and garlic together in a large pot over medium heat until garlic is lightly browned. Add chicken and brown both sides. Add broth, oyster mushrooms, rice, potato, carrots and celery. Cover pot, reduce heat to low and simmer until chicken is cooked through, about 20 to 25 minutes.

Remove chicken breasts from pot; remove meat from bones and discard bones. Return chicken pieces to soup along with dill and lemon juice.

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